{"id":104499,"date":"2024-10-22T17:43:53","date_gmt":"2024-10-22T09:43:53","guid":{"rendered":"https:\/\/server.hk\/cnblog\/104499\/"},"modified":"2024-10-22T17:43:54","modified_gmt":"2024-10-22T09:43:54","slug":"redis-%e9%81%8e%e6%9c%9f%e6%a9%9f%e5%88%b6%e5%af%a6%e7%8f%be%e5%a4%9a%e7%b7%9a%e7%a8%8b%e4%ba%92%e6%96%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/104499\/","title":{"rendered":"Redis \u904e\u671f\u6a5f\u5236\u5be6\u73fe\u591a\u7dda\u7a0b\u4e92\u65a5"},"content":{"rendered":"

Redis \u904e\u671f\u6a5f\u5236\u5be6\u73fe\u591a\u7dda\u7a0b\u4e92\u65a5<\/h1>\n

\u5728\u7576\u4eca\u7684\u61c9\u7528\u7a0b\u5f0f\u958b\u767c\u4e2d\uff0c\u6027\u80fd\u548c\u6548\u7387\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002Redis \u4f5c\u70ba\u4e00\u500b\u9ad8\u6548\u7684\u9375\u503c\u5b58\u5132\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u652f\u6301\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u3002\u5176\u4e2d\uff0c\u904e\u671f\u6a5f\u5236\u548c\u591a\u7dda\u7a0b\u4e92\u65a5\u662f\u5169\u500b\u91cd\u8981\u7684\u7279\u6027\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u8cc7\u6e90\u548c\u6578\u64da\u3002<\/p>\n

Redis \u7684\u904e\u671f\u6a5f\u5236<\/h2>\n

Redis \u7684\u904e\u671f\u6a5f\u5236\u5141\u8a31\u7528\u6236\u70ba\u9375\u8a2d\u7f6e\u4e00\u500b\u751f\u5b58\u6642\u9593\uff08TTL, Time To Live\uff09\u3002\u7576\u9019\u500b\u6642\u9593\u5230\u9054\u5f8c\uff0c\u8a72\u9375\u5c07\u81ea\u52d5\u88ab\u522a\u9664\u3002\u9019\u4e00\u7279\u6027\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u7de9\u5b58\u3001\u6703\u8a71\u7ba1\u7406\u7b49\u3002<\/p>\n

\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u7684\u547d\u4ee4\u975e\u5e38\u7c21\u55ae\uff0c\u4f7f\u7528 EXPIRE<\/code> \u547d\u4ee4\u5373\u53ef\uff1a<\/p>\n

EXPIRE mykey 60<\/code><\/pre>\n
\u4e0a\u8ff0\u547d\u4ee4\u5c07\u6703\u5728 60 \u79d2\u5f8c\u81ea\u52d5\u522a\u9664\u9375 mykey<\/code>\u3002\u6b64\u5916\uff0cRedis \u9084\u63d0\u4f9b\u4e86 SETEX<\/code> \u547d\u4ee4\uff0c\u9019\u500b\u547d\u4ee4\u53ef\u4ee5\u5728\u8a2d\u7f6e\u9375\u7684\u540c\u6642\u8a2d\u7f6e\u904e\u671f\u6642\u9593\uff1a<\/p>\n
SETEX mykey 60 \"Hello, Redis!\"<\/code><\/pre>\n
\u591a\u7dda\u7a0b\u4e92\u65a5\u7684\u9700\u6c42<\/h2>\n
\u5728\u591a\u7dda\u7a0b\u74b0\u5883\u4e2d\uff0c\u8cc7\u6e90\u7684\u5171\u4eab\u548c\u7af6\u722d\u662f\u5e38\u898b\u7684\u554f\u984c\u3002\u7576\u591a\u500b\u7dda\u7a0b\u540c\u6642\u8a2a\u554f\u540c\u4e00\u8cc7\u6e90\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e0d\u4e00\u81f4\u6216\u932f\u8aa4\u7684\u7d50\u679c\u3002\u56e0\u6b64\uff0c\u5be6\u73fe\u4e92\u65a5\u9396\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n
Redis \u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u7684\u65b9\u5f0f\u4f86\u5be6\u73fe\u4e92\u65a5\u9396\uff0c\u901a\u904e\u4f7f\u7528\u904e\u671f\u9375\u4f86\u9632\u6b62\u6b7b\u9396\u7684\u60c5\u6cc1\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u57fa\u672c\u601d\u8def\u662f\uff1a\u7576\u4e00\u500b\u7dda\u7a0b\u9700\u8981\u8a2a\u554f\u5171\u4eab\u8cc7\u6e90\u6642\uff0c\u5b83\u9996\u5148\u5617\u8a66\u8a2d\u7f6e\u4e00\u500b\u5e36\u6709\u904e\u671f\u6642\u9593\u7684\u9396\u9375\u3002\u5982\u679c\u8a2d\u7f6e\u6210\u529f\uff0c\u5247\u8a72\u7dda\u7a0b\u53ef\u4ee5\u5b89\u5168\u5730\u8a2a\u554f\u8cc7\u6e90\uff1b\u5982\u679c\u5931\u6557\uff0c\u5247\u8868\u793a\u5176\u4ed6\u7dda\u7a0b\u5df2\u7d93\u7372\u5f97\u4e86\u9396\uff0c\u8a72\u7dda\u7a0b\u9700\u8981\u7b49\u5f85\u3002<\/p>\n
\u5be6\u73fe\u4e92\u65a5\u9396\u7684\u793a\u4f8b<\/h2>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 Redis \u5be6\u73fe\u4e92\u65a5\u9396\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n
\ndef acquire_lock(redis_client, lock_name, timeout=10):\n    # \u5617\u8a66\u7372\u53d6\u9396\n    if redis_client.set(lock_name, \"locked\", ex=timeout, nx=True):\n        return True\n    return False\n\ndef release_lock(redis_client, lock_name):\n    # \u91cb\u653e\u9396\n    redis_client.delete(lock_name)\n\n# \u4f7f\u7528\u793a\u4f8b\nif acquire_lock(redis_client, \"my_lock\"):\n    try:\n        # \u57f7\u884c\u9700\u8981\u4e92\u65a5\u7684\u64cd\u4f5c\n        pass\n    finally:\n        release_lock(redis_client, \"my_lock\")\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0cacquire_lock<\/code> \u51fd\u6578\u5617\u8a66\u8a2d\u7f6e\u4e00\u500b\u540d\u70ba my_lock<\/code> \u7684\u9396\u9375\uff0c\u4e26\u8a2d\u7f6e\u904e\u671f\u6642\u9593\u70ba 10 \u79d2\u3002\u5982\u679c\u8a2d\u7f6e\u6210\u529f\uff0c\u5247\u8fd4\u56de True<\/code>\uff0c\u8868\u793a\u7372\u5f97\u9396\uff1b\u5426\u5247\u8fd4\u56de False<\/code>\u3002\u7576\u64cd\u4f5c\u5b8c\u6210\u5f8c\uff0c\u4f7f\u7528 release_lock<\/code> \u51fd\u6578\u91cb\u653e\u9396\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
Redis \u7684\u904e\u671f\u6a5f\u5236\u548c\u591a\u7dda\u7a0b\u4e92\u65a5\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u7ba1\u7406\u8cc7\u6e90\u548c\u6578\u64da\u3002\u5728\u9ad8\u4e26\u767c\u7684\u74b0\u5883\u4e2d\uff0c\u5408\u7406\u5730\u4f7f\u7528\u9019\u4e9b\u7279\u6027\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u61c9\u7528\u7a0b\u5f0f\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002\u7121\u8ad6\u662f\u5728\u7de9\u5b58\u7ba1\u7406\u9084\u662f\u8cc7\u6e90\u9396\u5b9a\u65b9\u9762\uff0cRedis \u90fd\u80fd\u5920\u63d0\u4f9b\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc \u9999\u6e2f VPS<\/a> \u670d\u52d9\u6709\u8208\u8da3\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u80fd\u5920\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f\u9700\u8981\u9ad8\u6027\u80fd\u7684 \u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f\u7a69\u5b9a\u7684 \u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u76f8\u61c9\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Redis \u904e\u671f\u6a5f\u5236\u53ef\u5be6\u73fe\u591a\u7dda\u7a0b\u4e92\u65a5\uff0c\u78ba\u4fdd\u8cc7\u6e90\u5b89\u5168\u8a2a\u554f\uff0c\u63d0\u5347\u61c9\u7528\u6027\u80fd\u8207\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-104499","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/104499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=104499"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/104499\/revisions"}],"predecessor-version":[{"id":104500,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/104499\/revisions\/104500"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=104499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=104499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=104499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}